DNase definition, deoxyribonuclease: any of several enzymes that break down the double-stranded or single-stranded DNA molecule into its component nucleotides. See more. Dictionary.com
They would joke around about forming a band in the halls. Eventually they did and named it Seven Nations. Seven Nations got its start in New York City in 1993 as the part-time project of then-bartender McLeod, under the name Clan Na Gael. Lead singer Kirk McLeod states that late 1993 was the first time we added bagpipes to the show, and therefore the origin of the band as it is today.
Today, there are few athletic venues the song hasn't invaded. Seven Nation Army has appeared at both Michigan and Ohio State, and also at obscure schools (check out this rendition by St. Cloud State's band). At Euro 2008, it was played and chanted incessantly at stadiums in Austria and Switzerland.